Pattern grading machine



April 21, 1931. PECHER PATTERN GRADING MACHINE Filed Feb. 6, 1.929 2 Sheets-Sheet l V WI/E/VTU/F 9 April 21, 1931.

A. PECHER PATTERN GRADING MACHINE Filed Feb. 6. 1929 2 Sheets-Sheet 2 WVfA/TU/P' Patented Apr. 21, 1931 UNITED STATES PATENT OFFICE.

ALBRECHT PECHER, F OREBRO, SWEDEN, ASSIGNOR TO UNITED SHOE MACHINERY GOBIORATION, OF EATER-SON, NEVI JERSEY, A CORPORATION OF NEW JERSEY PATTERN GRADING MACHINE Application filed February 6, 1929, Serial K0 3375328, and in Sweden December 8, 1928.

This invention relates to patterngrading machines. Such machines are provided with model and work holding means and a model follower and a tool, with grading mecha nism arranged to reproduce the model pantographically in the work.

It is a principal object of the present invention to provide a simple and practical machine in which the longitudinal and transverse characteristics of the model pattern can be magnified or reduced independently of each other. To this end, in the illustrated machine, the model and the work piece are movable against the model guide and cutting tool, the latter of which is stationary in efiective position, and the former of which is given a differential movement which efi'ects the magnification, or grade.

The invention also provides a novel mechanism for effecting this differential movement. In the illustrated machine, the model guide is mounted on a swinging 'arm controlled by one pantographic mechanism and the arm is mounted on a slide, controlled by another pantographic mechanism.

These and other features of the invention will be more fully pointed out in the following description of a'preferred embodiment, reference being made to the accompanying drawings, in which r Fig. 1' is a front elevation of the machine;

Fig. 2 is a plan;

Fig. 3 is an end elevation; and

Fig. 4 is a detail of the work holder.

The frame or support lot the illustrated pattern grading machine carries a slide 2 which is movable in the direction of its length and is fitted with guide slots 2 for a second slide 3, which is movable in the crosswise direction of the frame. The slide Sis intended to carry a model-supporting arm 4. at the free end of whichthe model pattern 5 is fastened in such a manner that it can be changed, for example, by means of the wing nut 6. By means of the two slides 2 and 3, mentioned above, it is possible to move the model parallel to itself either in the direction of the length of the frame 1 or in a crosswise direction or in a direction between the two, in which case both the slides 2 and .3 move with reference to each other and to the frame 1.

The frame 1 further carries a guide 7 for a slide 8, which is movable in the direction of the length of the frame, and on which is mounted a guide-pin holder or arm 9' which is pivotally movable around a pin 9 in the slide 8. In addition, two grading levers 12 and 13 are pivotally mounted on the fixed pins 10 and 11 on the frame 1. The lever 12 is affected or turned by the movement of the slides 2, 3 in the longitudinal direction of the frame by means of an arm 14 which is firmly fixed to the slide 2. This arm 14 is pivotally joined by means of the connecting rod 15 to the free end of the lever 12. The lever 13 is turned by the movement of the slide 3 in the cross direction of the frame, and its free end is guided in a slot 3 in the arm 3 of the slide. The slot 3" is arranged parallel to the longitudinal direction of the frame so that when the slides 2, 3 are moved in this direction they do not cause any turning of the lever 13, though the said lever is turned when the slide is moved in the crosswise direction of the frame.

As is particularly evident in Fig. 2, the levers 12 and 13 are each provided with curved slots 12 and .13, the center lines of which pass through the axes of the respective levers. By means of these slots 12 and 13' it is possible to connect the guide pin holder 9 pivotally and adjustably with the levers 12 and 13', which connections are most conveniently made by means of. the blocks16 and 17 which are pivoted to the ends of the conneetinglrods 12" pivoted to the slide 8 and 13 pivoted to the slide 9, and are adjustable in the slideways or slots 12 and 13' mentioned. The lock-screws 16 and 17 then act so as to keep the connecting rods 12 and 13 in the positions in which they have been placed in their respective slideways or slots 12 and 13'.

In this way the connecting rod 12" can thus be adjusted and fixed in such a position with reference to the pinion 10, about which the lever 12 turns, that the said lever an act to or reduce the longitudinal char entertains er the model a: the workand in the same way the connecting rod 13" can be adjusted and fixed in such a position with reference to the pin 11, about which the lever 13 turns, that the lever 13 can magnify or reduce the lateral characteristics of the model in the work by the differential motions thus given t6 the guide pin 9.

The slide 3 described above is also fitted with a. work table 18 the object of which is tb carry the frame 19 in which a cardboard or paper work piece-20 is held on which the graduated patterns for the various sizes of shoes are stamped or cut out or drawn (see Fig. 4) A stamping knife or a cutting knife 21 is fitted in the usual manner for cutting or stamping out the various patterns in the cardboard and is given a rapid up-and-down mdtion by means of a quickly rotating axle. Itis advisable to fix under the supporting surface 20' in the frame 19 a support or a cushion 22 on an arm 23 on the frame 1.

Theaction of the pattern grading machine isms follows:

-.If theconnecting rods 12" and 13" with thbir lie cti've blocks are adjusted in the manner 5 own in Fig. 2 with reference to the we of the levers 12 and 13, and the slides 2, 3 bemoved by hand with the model 5 in such s mmer, to the left in Fig. 2, that the edge of the modelb constantly slides against the guide pin 9, then this movement of the slides 2,*B"inthe longitudinal direction of the frame must also cause a movement of the guide pin holder 9 with the guide pin 9 in the same direction as the slide 3 (i. e., to the left in Fig. 2')by means-of the arm 14, the connectin g'iod 15, and the connecting rod 12".

Onaocount'of the curved shape of the lowor edge of the model shown (i. e., the upper edgeh'ne of the model 5 in Fig. 2) there is alsocaumd by the above-mentionedmovement of the slides 2 and 3 a movement sidewise of the slide 3 (downwards in Fig. 2) with reference to the slide 2. In this manner the free end of the lever 13 is turned outwards from the center line of the frame 1, so that the connecting rod 13" is pulled downwards in Fig. 2 and the guide pin holder 9' with the guide pin 9 is turned in a corresponding degree in a clockwise direction around the pin 9". The guide pin 9 thus makes a compound movement partly arising from the movement of the slide 2 in the longitudinal diLection of the frame and partly from the movement of the slide 3 laterally with reference to the slide 3 and since, with the described adjustments, the movements of the guide pin take place in the same direction as the movement of the model 5 round the guide pin,'-there is obtained on the cardboard or paper- 20 (Fig. 1 and Fig. 4) by means of the stamp or knife 21, an enlarged copy of the model 5, although the length and breadth of the copy obtained are enlarged to a different degree, i. e., the length of the model is more enlarged than its breadth.

It will also be easily seen that if the blocks 16 and 17 be fixed by means of their lock bolts 16 and 17 in alinement with the pins 10 and 11, no movement of the guide pin 9 is caused by the movement of the slides 2, 3 or the movement of the model 5 around the pin 9. \Vith this last adjustment, the copy on the cardboard or paper 20 will be of the same size as the model 5.

Again, if the adjustment of the blocks 16' and 17 and the connecting rods 12 and 13 be made so that the said blocks are on the other side of the axes of the levers 12 and 13 or of the pins 10 and 11, a reduction of the length and breadth proportions of the shoe model is obtained on the cardboard or paper 20. By means of a successive alteration of the adjustment of the connecting rods 12" and 13 in the curved slots 12 and 13, all the intermediate sizes can be graded from the model 5.

The details of the machine can naturally be varied in a number of ways without departing from the principle of the invention.

Having'thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a pattern grading machine, amain frame, a work piece and model holder universally movable in a plane, a stationary tool on the frame arranged to contact with the edge of a work piece in the holder, a movable guide pin arranged to contact with the edge of a model in the holder, and two pantographic mechanisms acting at right angles to each other, connecting the guide pin to the holder, arranged to impart two differential movements, at right angles, to the guide pin to effect the desired longitudinal and lateral grade.

2. In a pattern grading machine, a main frame, a slide mounted thereon and arranged for universal movement in a horizontal plane, model and work holding means mounted on the slide, a cutting tool mounted on the frame and adapted to trim the edge of a work piece in the work holding means, a model follower mounted movably on the frame, and length and width grading mechanisms arranged to transmit to the model follower predetermined fractions of the movement of the slide in two perpendicular directions respectively.

3. In a pattern grading machine, a. main frame, a slide mounted thereon and arranged for universal movement in a horizontal plane, model and workholdingmeansmounted on the slide, a cuttin tool mounted onthe frame and adapted to trim the edge of awork piece in its work holding'means, a second'slide on the frame, an arm pivoted on the slide and carrying a model follower, a grading mechanism arranged to transmit to the second slide a predetermined fraction of the movement of the first-named slide in a certain direction, and a second grading mechanism arranged to transmit to the arm a predetermined fraction of the movement of the first-named slide in a perpendicular direction.

4:. In a pattern grading machine, a frame, a first slide mounted thereon, a second slide on the first slide and arranged to move in a direction perpendicular to the movement of the first slide, model and Work holding means on the second slide, a third slide mounted on the frame arranged to move in the same direction as the first slide, a gradin mechanism connecting the first and thir slides, an arm pivoted on the third slide and carrying a model follower, a second grading mechanism connecting the arm and the second slide, and a tool mounted on the frame.

In testimony whereof I have signed my name to this specification.

ALBRECHT PECHER. 

